41 Educational services for students in grades preK-12, namely, providing online interactive instruction in the fields of language arts, mathematics, science, social studies, and foreign languages, providing online instructional video materials, games, and game activities in the field of language arts, providing online non-downloadable interactive reading materials and writing exercises in the fields of language arts and science, and providing non-downloadable text materials in the nature of novellas, stories, articles, and poetry, enhanced with non-downloadable audio and video recordings and visual illustrative material, for independent reading by students; Educational services for teachers and school administrators, namely, providing live and online training in the use of learning programs for students in grades preK-12 in the fields of language arts, mathematics, science, pre-kindergarten studies, and social studies, providing online educational training videos, tutorials, background information, lesson plans, answer keys, and other resource materials; Educational assessment services, namely, providing formative and summative assessments to states and school districts, for students in grades K-12 in the fields of math, reading, science, and social studies; Providing homeschooling parents with curricula and assessment services in the fields of language arts, mathematics, science, social studies, and foreign languages for grades preK-12; Developing curricula and customized instructional materials for school systems